Improvement in apparatus for grinding lathe-centers



W.S.JMBBU Apparatus for Grinding Lathe Benters. No. 134,287, PatentedDec.24,1872.

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WALTER S. JARBOE, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND J. F.WOOD, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN APPARATUS FQR GRINDING LATHE-CENTERS.

Specification formingpart of Letters Patent No. fi allfigi', datedDecember 24, 1872.

To all whom it may concern:

Be it known that I, WALTER S. Jansen, of the city, county, and State ofNew York, have invented a new and useful Improvement in Apparatus forGrinding Lathe-Centers; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawing forming part of this specification, and inwhich- Figure "1 represents a plan of my improved apparatus applied to alathe-center; Fig. 2 a side view of such apparatus, and Fig. 3 an endview thereof.

Similar letters of reference indicate corresponding parts.

This invention relates to rotary tools for grindinglathe-centers afterthey are tempered, and while in their places in the lathe. The inventionconsists in a combination and arrangement of parts whereby theapparatus, which is harried by the tool-post or slide-rest of thelat-he, may be operated by power derived from the lathemandrel, andevery facility is afforded for manipulating or adjusting the grinder toits Work, and its operating pulleys or devices to differentlathe-mandrels or angular positions of the grinder.

A is the revolving grinder, which may be of any suitable material orcomposition. Bis the shaft on which said grinder is secured. This shaftis arranged in a bearing or frame, 0 O,

- the one portion 0 of which forms an arm for reception, as at b, of theapparatus within the tool-post or slide-rest of the lathe, while theother portion, 0, of said frame constitutes a sliding yoke or bearingpiece proper for the shaft B to make said grinder-shaft a sliding one.The portion 0 of said frame also serves to carry a standard, D. Thisstandard may be composed of a bent rod, and serves a double purpose,namely, as a support for a series of guide-pulleys, E E and F F, wherebyto rotate the grinder, and also as a fulcrum for a lever, G, whichserves through the instrumentality of the bearing portion 0 tolongitudinally slide the shaft B for the purpose of moving the grinder Aalong or over the lathe-center, as represented in Fig. l of the drawing.The guide-pulleys E E and F F serve to pass a band, H, from any one ofthe mandrel-pulleys of the lathe to a pulley, I, on the slidinggrinder-shaft B, and are adjustable on or around the arms of thestandard D, as also the latter made adjust-able through the portion 0 ofthe frame, to provide for adapting the apparatus to different mandrelsand lathe-centers. When once adjusted it is only necessary to move thelever G back and forth by hand, when the grinding, so far as regards therotation of the wheelAis concerned, will be effected by power derivedfrom the revolving mandrel of the lathe.

What is here claimed, and desired to be secured by Letters Patent, is;-

1. The combination, with the grindershaft arranged in a bearing or frameorganized for reception in the tool-post or slide-rest, of a series ofguide-pulleys attached to said bearing or frame, and arranged to receivea band from the lathe-mandrel, the whole being eonstruct-ed andoperating substantially as herein v specified.

2. The arrangement of the bearing or frame 0 G, the slidinggrinder-shaft B, the lever G, and the standard D, which serves as thefulcrum for the lever and the support for the guide-pulleys, allsubstantially as herein described.

XVALTER S. J ARBOE.

Witnesses FRED. HAYNES, W. E. SIMPSON.

